Posts by Ronaldo Lopes • 453 points
45 posts
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answers108
viewsQ: Denied permission to create file in flutter
I have an application in Flutter that generate file and compact in the Android download directory and makes available to the user. In Devices with Android 9, It was no problem, but the on Android 10…
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answers289
viewsQ: Error "setState() called after Dispose()" in flutter
Good morning, I’m getting the following error message on the flutter: [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: setState() called after dispose():…
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answer533
viewsQ: Save files from download directory with flutter
I am generating a PDF file and I want to save it in the "downloads" of mobile device, I am using "downloads_path_provider: 0.1.0" for this but when I save I have the following error:…
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answer591
viewsQ: Filter in list with flutter
I need to filter in a list type JSON based on your ID, I am loading the data from the list and then having to filter with Where, but it returns empty even if your ID exists. The list goes like this:…
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answer260
viewsQ: Creating flutter tables generating error in such table
I’m having a problem where I’m not being able to create more than one table in the fluuter sqlite. When trying to create a table if the database has already been created generates the error no such…
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answer54
viewsQ: Update method with flutter and sqlite generating error
Good morning, I am updating to sqlite with Flutter and am having the following error: NoSuchMethodError: The method 'update' was called on null. I built the code according to the documentation where…
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answer98
viewsQ: Tabbarview with card generating error while loading data into flutter
Good morning, I’m starting now in the flutter world and I’m mounting a Tabbarview card with data coming from a bank. I’m putting it inside Listview so I can separate it into tabs and load the data…
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answer351
viewsQ: Take the return value of a Datepicker on a texFormField with flutter
Good afternoon! I’m starting my studies in Flutter and I created a simple form, where when clicking on a date field, it displays the datepicker, but when selecting the date the field is not filled.…
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answer56
viewsQ: Return data from a query without certain fields
Good morning, I made a query that returns only completed data between a given period, I only need these two data but entityframework is demanding some fields that I do not need as ID. Is there any…
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answer616
viewsQ: Version incompatibility 'Microsoft.AspNetCore.App'
Good afternoon, I’m starting my studies with. NET Core for a project and had to change computer, while restoring the project I am having the following problem: It was not possible to find any…
asp.net-coreasked Ronaldo Lopes 453 -
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answer47
viewsQ: Consult data in three tables where only two are related
Good afternoon, I will try to explain a situation where I am, I have 3 tables(A,B,C) where A and B are directly related, B and C are also related. I need to get the value of a field in table C where…
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answer941
viewsQ: Error running ASP.NET Core application
I am starting the journey to learn ASP.NET Core and when I try to run the application I have the following error: An unhandled Exception occurred while Processing the request. Socketexception: No…
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answer101
viewsQ: Aggregation with Mongodb and $lookup
Good morning, I’m trying to fetch data from two different collections with common values using Aggregate and lookup, but when executing the query it returns empty. I did it this way:…
mongodbasked Ronaldo Lopes 453 -
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answer98
viewsQ: Resolvelibraryprojectimports error in Xamarin
Good afternoon, I went to compile the APP I’m creating with Xamarin and I’m having the following error: Unexpected failure of "Resolvelibraryprojectimports" task. I already cleaned the solution,…
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answer185
viewsQ: PIVOT query in Mysql
I have a query in SQL Server using PIVOT that returns the data in column as image below: The query is this: SELECT * FROM( SELECT ftd.DateAndTime AS dt, ftd.Val AS Val, CONVERT(VARCHAR,…
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answers119
viewsQ: Binding between components with XAML and C#
I need that when selecting an item in a combobox, the textbox is released for editing and its completion is required, as image below: This Binding is being active by clicking on the new button,…
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answer243
viewsQ: Error executing update with sub-query
I have the following situation, I need to update several fields based on the return of a sub-query that returns a main code. This subconsultation is done with Join in two tables to obtain the code.…
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answer33
viewsQ: Sleeping with Typescript
Good afternoon, I am in need of making the typescript excute a call every 10 milliseconds. I gave a search using setInterval but the information comes as Undefined but when I save, the values in…
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answer180
viewsQ: Query with multiple Ids and date with JPA and Spring via Restapi
Good morning, I’m trying to set up a query with Spring JPA and Rest where I can insert several Ids and initial and final date. The query works if I only put an ID with the dates. The code is like…
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answers131
viewsQ: Multiple query values with JPA/Sprint and Rest
Good morning, I need to make a query via REST where multiple ID will be sent for example (ID: 1, ID: 2, ID:3, etc). To search only for an ID I use findById(codigo), but I don’t know how to use…
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answers175
viewsQ: Error when creating tables with relation and JPA
Good morning, I’m trying to create two tables with flyway+Spring+Sqlserver+JPA, very simple thing just to pass the time and I’m having an error that I can’t understand because running the same…
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answers277
viewsQ: Recover information from a sharedPreference Android
Good evening, I have some information saved in Sharedpreferences(email and password) and need to recover them in several places for use. I created a Fragment so the user can save the screen:…
androidasked Ronaldo Lopes 453 -
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answers25
viewsQ: Date with IONIC and angulaJS and firebase
Good morning, I’m taking the date from firebase to IONIC with the help of angular and I’m getting the following error message: Error Parsing date: "1531595027828". Please provide a Valid ISO 8601…
ionicasked Ronaldo Lopes 453 -
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answers102
viewsQ: Sort ion-list by date
Good morning, I am studying IONIC with Firebase and created a simple list where I want it to be sorted by update date. In the image we can see that the date is the same as it came from Firebase. I…
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answer298
viewsQ: Consultation with Ionic and firebase
I’m trying to make an appointment at firebase with Ionic and I’m having the following mistake: The source is like this: import { Injectable } from '@angular/core'; import firebase from 'firebase'…
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answer288
viewsQ: Data update with IONIC and Firebase
Good evening, I’m studying Firebase with IONIC and Angular (I’m not using Angularfire) and a question has arisen. How do I update the data saved in Firebase? To get the data I do as follows: const…
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answer880
viewsQ: Multiple rows in a Sql Server column
I have a problem where I need to join the return of a query made in two tables in a single row. I thought I’d use PIVOT but I couldn’t because of INNER JOIN. The consultation is like this: SET…
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answers103
viewsQ: String for date and day subtraction javascript
I need to convert a date that comes as string to Date and subtract a day from that date. I did it this way: dataConvertida = new Date("2018-07-03") But when making the conversion, it automatically…
javascriptasked Ronaldo Lopes 453 -
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answers5979
viewsQ: Error while running spring security
I’m having the following mistake: Field authenticationManager in com.ronaldo.money.api.config.AuthorizationServerConfig required a bean of type…
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answer39
viewsQ: Starting with Angular
I made a little source with controller in Angularjs and when executing I receive the error of the attached message. I don’t know where the error could be considering that this code is very simple.…
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answers934
viewsQ: Best way to save login data
Good afternoon, what would be the best way to save a user’s login data? I have a PHP login system that validates user and password via ajax and if everything is ok, I want to save the data (email in…
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answers423
viewsQ: Calling PHP function in a class
Good afternoon, I am creating a simple PHPOO system with MVC and would like to run a function inside the controller with a jquery call. I don’t want to call the controller in html, I want a js to do…
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answer1700
viewsQ: Routes with slim PHP framework
Good afternoon, I have almost no experience with slim framework and am giving a studied by book. I downloaded via Composer and installed version 3.8 and had some differences. I tried to create a…
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answers289
viewsQ: How to publish App in visual studio 2017 with ASP.MVC 5
Good afternoon, I am etudando ASP.MVC 5 and made a test app, published it in visual studio exporting to a directory and tried to climb the same in IIS on Windows 10. I did all the procedure…
asp.net-mvcasked Ronaldo Lopes 453 -
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answer119
viewsQ: Jasperview closing the entire system
I don’t even know how to explain it but I’ll try. I have a system made in Javafx that displays reports with Jasper according to the selected item, until then everything quiet, when selecting an item…
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answers3523
viewsQ: ASP.MVC error "cannot find resource"
I’m starting in ASP.NET and tried to create a test app. When running by Visual Studio I have the print error. I created a standard MVC 5 project, created the controller the model and the view each…
asp.net-mvc-5asked Ronaldo Lopes 453 -
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answer124
viewsQ: Jasper with javafx does not open by jar
I have a strange problem, I made an application with javafx and jasperstudio and when running inside the eclipse works perfectly. When generating the . jar and run, it works, but if I remonear the…
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answers641
viewsQ: Exchange information between Javafx windows
Good afternoon, I need to exchange information between different windows (Scene) with javafx, I searched the net and saw that the most common is to use controller communication. My scenario is this:…
javafxasked Ronaldo Lopes 453 -
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answer443
viewsQ: Tableview does not display data with Javafx
Good morning, I am mounting a layout with tableView loaded with database information and FXML, while running realized that the tableview receives the values of my dao because it displays exactly the…
javafxasked Ronaldo Lopes 453 -
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answers162
viewsQ: "more than one device/Emulator" when trying to use the mobile phone in Android Studio
Good morning, I started studying game development for Android and I felt the need to use the smartphone instead of the emulator, I set the adb, the same recognized, but nothing appears in Avd. what…
android-studioasked Ronaldo Lopes 453 -
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answer291
viewsQ: Error running . jar out of eclipse with javafx
I’m trying to run a .jar outside the eclipse and is returning the following ERROR: C: Risc>java -jar Graphicalreport.jar Exception in Application start method Exception in thread "main"…
javafxasked Ronaldo Lopes 453 -
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answers1093
viewsQ: Run minute to minute routine with C#
Good morning, I have a problem that I have not been able to solve, I have a routine that will monitor an equipment every second and when it turns the minute the system will perform the desired…
c#asked Ronaldo Lopes 453 -
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answer436
viewsQ: How to use external CSS in a Javafx application?
I’m making an application with Javafx and would like to put the CSS in external file, for example, the file would be located in the directory "C: app css". It is possible to recognize the external…
javafxasked Ronaldo Lopes 453 -
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answer517
viewsQ: Socket with C# and java
Good morning, I am writing an application where the server socket is in C#(due there are some drivers have to be in c#) and the client in Java. I can make the communication perfectly between them,…
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answers69
viewsQ: Activity does not work as it should
Good afternoon, I have a class that receives parameters from another Internet to perform the search in a webservice, when you enter onCreate, check if the instance is being created for the first…
androidasked Ronaldo Lopes 453